[Atrio-ventricular conduction in patients with permanent right- ventricular stimulation. II. Atrio-ventricular conduction time in patients with normal and impaired atrio-ventricular conduction].
We analyzed transesophageal ECG recordings of 79 patients (42 men and women aged 17-85 mean 61 +/- 16 yrs) with present ventriculo-atrial conduction phenomenon during permanent VVI stimulation. All measurements we performed on basic and magnetic rate of the pulse generator. V-a conduction time was defined as mean (from 5 measurements) time from spike of the pulse generator to the first deflection of P wave recorded from esophagus and expressed in miliseconds. We compared v-a conduction time (v-act) on basic and magnetic rates of a stimulator and between groups with normal (group A, 49 pts) and prolonged a-v conduction time (group B, 30 pts). Group B was divided on group B-1 (19 pts without bundle branch blocks) and B-2 (11 pts with bundle branch blocks during observations). V-act during magnetic rate (cycle 596 +/- 70 ms) was significantly longer than during basic rate (cycle 834 +/- 66 ms) (191 +/- 48 ms vs 185 +/- 44 ms, p 0.05). V-act in patients with a-v block (group B) was significantly longer than in patients with normal a-v conduction (group B) (219 +/- 45 ms vs 190 +/- 47 ms, p 0.02). The longest v-act was observed in group B-2 (236 +/- 32 ms).


CONCLUSIONS
1. Ventriculo-atrial conduction time could be measured in patients with permanent VVI stimulation using esophageal ECG recording. 2. Shortening of the stimulation cycle prolonges ventriculo-atrial conduction time. 3. Ventriculo-atrial conduction time is longest in group with atrio-ventricular conduction disturbances, especially in group with registered bundle branch block.
Ciemniewski
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Z
Kliniki Kardiologii Instytutu Kardiologii Sl. AM.
Zajac
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T
Kargul
W
W
Giec
L
L
D000293:Adolescent; D000328:Adult; D000368:Aged; D001283:Atrioventricular Node / Q000502:physiology* / Q000503:physiopathology; D002304:Cardiac Pacing, Artificial / Q000379:methods; D006327:Heart Block / Q000503:physiopathology* / Q000628:therapy; D006352:Heart Ventricles / Q000294:innervation / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged; D010138:Pacemaker, Artificial; D012016:Reference Values; D013997:Time Factors; D016276:Ventricular Function
Przewodzenie komorowo-przedsionkowe u chorych z przewlekła stymulacja prawokomorowa. Cześć II. Czas przewodzenia komorowo-przedsionkowego u chorych z prawidłlowym oraz upośledzonym przewodzeniem przedsionkowo-komorowym.